/Engine/Source/Runtime/MovieScene/Public/Compilation/MovieSceneTemplateInterrogation.h
Add arbitrary data to the container under the specified key. Care should be taken by clients to ensure that data types that are added with specific keys are always accessed as the correct types
template<typename T> void Add ( T && InData, [FMovieSceneInterrogationKey](API\Runtime\MovieScene\Compilation\FMovieSceneInterrogationKey) Key )